What to use for corporate messenger Socket or SSE?

Question

JavaScript

Hey! I am making a small mobile application for an internal corporate messenger, the functionality is the same as in classic WhatsApp and telegrams.
Vue stack + F7 + Cordova, PHP server + NodeJs.
What is better to use to send from the server to the client:

From the client to the server just AJAX and back SSE, Longpoll, Socket?

It's just the first time I'm encountering this.

Or on the screen of the chat itself sockets, and on other SSE to receive message notifications, and in the background push notifications?

Answer 1

The question is how much do you want to mess with it. The cart, for example, has a Delivery service. Which can work as TCP\UDP Socket or HTTP client. They also have their own protocol on ProtocolBuffers.
I do not quite understand why you need php? If you are already using node. For a good start, try to do it on sockets.

Answer 2

smsc.ru - 3 years, "not a single break"

Answer 3

www.epochtasms.ru - they do everything normally, but for an alphanumeric signature you need to send a letter every time.

Answer 4

SMS Pilot

Answer 5

SMSINTEL - we have been using it for a year. They have a lot of features and ready-made integrations with many services. Even a built-in mechanism for coupon promotions. Recommend